Process for laser beam welding with reduced formation of end...

Details Process for laser beam welding with reduced formation of end... Process for laser beam welding with reduced formation of end...

2006-08-15

2006-08-15

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

By arc

C219S121610, C219S121800

Reexamination Certificate

active

07091444

ABSTRACT:
During laser beam welding a so-called end crater forms at the end of the weld seam. The end crater is formed by the volume shrinkage of the solidifying melt after the laser beam reaches the seam end and is switched off or repositioned. The end crater acts as a geometric notch and decreases the mechanical characteristics, in particular the operational stability, of the weld seam so that holes or tears in the area of the end crater can occur. The task of the present invention is thus comprised of providing a process for reducing end crater formation. The task is solved in that towards the seam end the focus of the laser beam is distanced from the surface to be welded and/or a transverse movement of the beam occurs.

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